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992

Appendix V.

side of the interspaces, reversing. the feed, when the cutting is
complete. The tool used is a ' shaving' tool, which cuts only on
its side edge, and which is only sharpened on its end, so that the
shape may be preserved.

%

CHAPTER VII.

P. 284. Rivet-heating Furnace.A convenient form of
furnace is  shewn in Fig. 914, as devised by Messrs. Fletcher,

;     A

BY

FLETCHER, fjU$SLL , &,

Russell, & Co., where by the consumption of less than one
gallon of petroleum oil per hour sufficient heat can be obtained
tip prepare from 300 to 400 rivets in the same time. The furnace